In our company we discuss the Twitter post of the Signal founder: https://moxie.org/2022/01/07/web3-first-impressions.html. One critique is, that the NFTs don't contain the hash of data (jpg, ...) but a link to a centralized page that is outside of the control of the blockchain and whose content can change.
How does it work for Cardano or CNFT.io for example. Do they contain the hash of the image or a Link to IPFS or something?
When I look at an NFT on CNFT.io I don't find a hash that works with https://explorer.cardano.org/ to check it myself.
Thanks in advance for hints!